CN104919819A - Communication of diagnostic information from satellite to host - Google Patents
Communication of diagnostic information from satellite to host Download PDFInfo
- Publication number
- CN104919819A CN104919819A CN201380070150.3A CN201380070150A CN104919819A CN 104919819 A CN104919819 A CN 104919819A CN 201380070150 A CN201380070150 A CN 201380070150A CN 104919819 A CN104919819 A CN 104919819A
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- CN
- China
- Prior art keywords
- amplifier
- satellite
- diagnostic
- main frame
- signal
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Amplifiers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
A vehicle sound system includes a subwoofer system (20) having a subwoofer (22), a satellite amplifier (24) for driving the subwoofer (22), a host amplifier (16) for receiving an audio signal, a noise management processing unit (29) for providing, to the host amplifier (16), information to be used for achieving a desired audio environment, a sensor (30, 32) for providing information to the noise management processing unit (29) concerning the ambient audio environment, a control line (26) for transmission of control signals from the host amplifier (16) to the satellite amplifier (24), and a signal line (28) for transmission of audio signals from the host amplifier (16) to the satellite amplifier (24). A satellite controller (25) is configured to cause a diagnostic signal to be placed on the control line (26), the diagnostic signal being indicative of an operating condition of the subwoofer system (20).
Description
Technical field
The disclosure relates to vehicle sounds system, and in particular to the communication between the amplifier in such vehicle sounds system.
Background technology
Modern vehicle sounds system comprises the loud speaker of the key position be arranged in vehicle.The main frame amplifier received from the audio signal of the such as head unit of CD Player, radio or other audio-source and so on drives these loud speakers.
Many vehicle sounds systems also specifically comprise subwoofer (subwoofer) to provide bass.This subwoofer more power more remarkable in other loud speaker pull.Consequently, in many vehicle sounds systems, subwoofer has its oneself independent amplifier, is commonly called " satellite amplifier ".
The parts of vehicle sounds system generally include diagnostic subsystem.These diagnostic subsystems make parts can by its operating conditions and another component communication.This allows other parts correspondingly to compensate or regulates its oneself operation.In common application, its operating conditions communicates with driving its main frame amplifier by satellite amplifier.
Although the diagnostic message receiving those loud speakers driven from it for amplifier is direct, the diagnostic message received from those loud speakers not being its Direct driver is much more difficult.Especially, in many amplifiers audio system, difficulty can be caused from satellite amplifier to main frame amplifier communicating diagnostic information.
Summary of the invention
The present invention is based on existing cable that use used by main frame amplifier and from satellite amplifier, diagnostic message communicated to main frame amplifier to control the identification of the possibility of the turn-on/off state of satellite amplifier.Which avoid the needs that the additional communication system being exclusively used in diagnostic message is provided.
In one aspect, the present invention has the feature of the device for controlling ambient audio environment.Such device comprises vehicle sounds system, this vehicle sounds system comprises the subwoofer system with subwoofer, for driving the satellite amplifier of subwoofer, for the main frame amplifier of received audio signal, for providing the clunk management processing unit waiting to be used to the information realizing the audio environment expected to main frame amplifier, for providing the transducer of the information about ambient audio environment to clunk management processing unit, for control line control signal being transferred to satellite amplifier between satellite amplifier and main frame amplifier, and between satellite amplifier and main frame amplifier for by audio signal transmission to the holding wire of satellite amplifier, this satellite controller is configured to cause diagnostic signal to be positioned on control line, the operating conditions of this diagnostic signal instruction subwoofer system.
Some embodiments also comprise additional loud speaker, and it is connected to be driven by main frame amplifier.
Each embodiment is different in diagnostic signal.In certain embodiments, satellite controller is configured to production burst bandwidth modulation signals as diagnostic signal, and in other embodiments, satellite and controller are configured to production burst modulation signals as diagnostic signal.In a further embodiment, satellite controller is configured to generate the diagnostic signal of the duty ratio of the specific operation situation with instruction subwoofer system.In other embodiments, diagnostic signal indicates the operating conditions selected from multiple operating conditions of subwoofer system.
Some embodiments also comprise diagnostic circuit, for the operating conditions determining subwoofer system.In these those comprise the register of the information for storing instruction operating conditions.
In other embodiments, satellite controller additional diagnostic signal on the control line during being configured to only to be dispersed between selected diagnostic region and monitoring between interval.When those diagnostic signals have duty ratio, monitor interval and can comprise the diagnostic signal not effective time.Thus, duty ratio is lower, monitors interval and just becomes longer.
Signal can be created in every way.A kind of mode provides to pull up transistor between described control line and DC bus, and provide satellite controller, makes it export and be connected to the grid pulled up transistor.Another kind of mode provides the transistor being connected to control line, and has satellite controller, makes it export to be connected to the grid of transistor.
Other embodiment comprises for support vehicle audio system and provides the motor vehicles of power to vehicle sounds system.The example of motor vehicles comprises passenger vehicle, truck etc.
In yet another aspect, the present invention has the feature of the main frame amplifier in vehicle sounds system and the method communicated between satellite amplifier.Such method comprises: at satellite amplifier place, the control command of from host amplifier is carried out via communications link reception, from the diagnostic message of the operating conditions of subwoofer system acceptance instruction subwoofer system, generate the diagnostic signal of instruction operating conditions based on this information, and this diagnostic signal is transferred to main frame amplifier on the communication link.
In practices more of the present invention, generate diagnostic signal and comprise generation to depend on the signal that the mode of the information indicating operating conditions is modulated.In other embodiments, generate diagnostic signal and comprise the pulse width modulating signal generating the duty ratio with instruction operating conditions.
Other practice of the present invention comprise determine communication link be between diagnostic region and monitor one of interval.
Practice is in addition that those wherein transmit diagnostic signal and comprise in response to the beginning detected between diagnostic region and start to transmit described diagnostic signal.
Additional practice is included in main frame amplifier place and performs noise reduction algorithm based on the diagnostic signal received from satellite amplifier at least in part.
In other, the present invention has the feature of the device for generating sound field within vehicle.Such device comprise satellite amplifier, main frame amplifier, between satellite amplifier and main frame amplifier for from satellite amplifier control command being transferred to the communication link of main frame amplifier and being used for transmitting on the communication link the device of diagnostic message of the operating conditions indicating the subwoofer system driven by satellite amplifier.
In certain embodiments, the device for transmitting comprises the device of the modulation signal of the duty ratio for generating the operating conditions with instruction subwoofer system.
Other embodiment also comprise for cause diagnostic signal only between diagnostic region period the device that is transmitted.
From following embodiment and accompanying drawing, these and other feature of the present invention will become apparent, wherein:
Accompanying drawing explanation
Fig. 1 shows the vehicle having and be provided with vehicle sounds system wherein;
Fig. 2 shows the additional detail of the vehicle sounds system described in FIG;
Fig. 3 shows the timing diagram of the vehicle sounds system for describing in fig. 1 and 2; And
Fig. 4 shows the particular implementation of the vehicle sounds system described in fig. 1 and 2.
Embodiment
Fig. 1 depicts vehicle 10, and it has the vehicle sounds system 12 be arranged on wherein.Audio system 12 comprises head unit 14, and it communicates with main frame amplifier 16.Main frame amplifier 16 receives the audio signal from head unit 14, is amplified, and provides the audio signal through amplifying of generation to each loud speaker in multiple loud speaker 18a-18d.
Main frame amplifier 16 also provides audio signal to subwoofer system 20.The subwoofer 22 that subwoofer system 20 comprises a large amount of power of needs and drives.Consequently, subwoofer system 20 comprises independent satellite amplifier 24 to drive subwoofer 22.
With reference to Fig. 2, main frame amplifier 16 is connected to satellite controller 25 via control line 26 and tone frequency channel wire 28.The control signal causing satellite controller to open or close marches to the satellite controller 25 within satellite amplifier 24 via control line 26, and audio signal marches to satellite amplifier 24 via tone frequency channel wire 28.
Main frame amplifier 16 also comprises clunk management processing unit 29, and it receives the information of the periphery acoustic environment within instruction vehicle 10.This information comprises direct information and collateral information, the information of direct information such as obtaining from the microphone 30 be strategically placed within vehicle 10, the information of collateral information such as such as being provided by engine speed indicating device 32.Use this information, clunk management processing unit 29 implements clunk management algorithm, and it exports and provides the basis of main frame amplifier 16 for the output of each loud speaker in control loudspeaker 18a-18d and subwoofer 22, thus realizes the audio environment expected.The system produced because of but closed loop feedback system, its function is output by controlling multiple loud speaker 18a-18d and subwoofer 22 and maintains specific audio environment.
In some cases, because fault, even if driven by satellite amplifier 24 also may not sounding for subwoofer 22.This may cause difficulty to feedback control system.Such as, main frame amplifier 16 can be determined to need more low-frequency content to the measurement of vehicle audio environment based on it.In this case, main frame amplifier 16 or clunk management unit 29 can increase the volume of subwoofer 22 by order satellite controller 25.Due to subwoofer 22 fault, main frame amplifier 16 will can't detect the change of audio environment.Supposition subwoofer 22 is not driven by enough loud by this main frame amplifier 16 unrealized.More power is provided subsequently by order satellite amplifier 25.These utilize the power demand constantly increased to make the continuous print of the subwoofer sounding damaged attempt being tending towards making closed-loop control system unstable.This may damage satellite amplifier 25.In addition, the interference produced in periphery acoustic environment may be frightened driver thus be caused accident.
In order to avoid this difficulty, vehicle sounds system 12 comprises the mechanism that the diagnostic message for the operating conditions by relating to subwoofer system 20 communicates with main frame amplifier 16.
Subwoofer 22 comprises the diagnostic subsystem 34 of the various electrical characteristics periodically measuring subwoofer.Based on those characteristics, diagnostic subsystem 34 identifies the operating conditions of subwoofer 22 and in status registers 36, provides the information of the operating conditions relating to subwoofer 22.Subwoofer 22 can be in some operating conditions any one, often kind of operating conditions has the entry of the correspondence in status registers 36.The scope of these operating conditions is from normal operations situation to the situation associated with dissimilar fault phase.
The satellite controller 25 of programming suitably from status registers 36 via I
2c (internal integrated circuit) link retrieving information.But, other physical communication method any can be used.Such as, the information from status registers 36 can also be retrieved via SPI.
Satellite controller 25 searches the duty ratio corresponding with this operating conditions subsequently.The diagnostic signal that this duty ratio is used to generate corresponding modulation subsequently returns main frame amplifier 16 for communication.This diagnostic signal is placed on identical control line 26, and control line 26 is used to opening/closing instruction to communicate satellite controller 25 from main frame amplifier 16.
In order to avoid conflicting between diagnostic signal with any control signal, satellite controller 25 is programmed to only during the interval 38A-38C of recurrent monitoring, check control signal, as shown in Figure 3.In some cases, these time ranges monitoring interval depend on duty ratio, and higher duty ratio causes shorter monitoring interval.In other cases, monitoring interval time range is fixing value.Monitoring at these between interval 38A-38C is 40A-40C between diagnostic region, and between these diagnostic region, satellite controller 25 uses control line 26 that diagnostic message communication is returned main frame amplifier 16 period.
As shown in Figure 3, between the first diagnostic region during 40A, subwoofer 22 is in the operating conditions different from 40C between the 3rd diagnostic region.From the different duty ratio be associated from corresponding first and Part III 42A, 42C of diagnostic signal, this is apparent.
As the result of aforementioned process, being usually exclusively used in provides the control line 26 of control signal to be changed purposes to satellite controller 25 to return console controller 16 for also providing diagnostic message.The needs providing and be exclusively used in the independent communication system providing diagnostic message to return main frame amplifier 16 from subwoofer system 20 are be provided.Thus the vehicle sounds system 12 produced needs less parts and less cost for manufacture.Particularly, system and method described herein provides the method avoiding complicated high overhead communication scheme (such as RS485, LIN (Local Interconnect Network), CAN etc.).
In one embodiment, as shown in Figure 4, diagnostic signal by be provided in be connected between control line 26 with DC bus 46 pull up transistor 44 and optionally deactivated transistor 26 produced to remove upper pull-up voltage from this line.The diagnosis of satellite controller 25 export 48 be connected to pull up transistor 44 grid.
In operation, the section start between diagnostic region, satellite controller 25 check table 36 is to determine the duty ratio corresponding with the present situation of subwoofer 22.The signal of satellite controller 25 additional modulation on diagnosis exports subsequently, it causes diagnostic signal to be added on control line 26 subsequently.The signal of such modulation can be pulse width modulating signal or pulse code modulation signal.
Monitoring the section start of interval 38A, satellite controller 25 pulls up transistor 44 at diagnosis output 48 place Applied gate signal to remove from circuit, thus allows satellite controller 25 to monitor the control signal of from host amplifier 16.This occurs until 40B initial between new diagnostic region.
In embodiment in figure 3, between the baseline voltage of diagnostic signal on control line 26 and the higher voltage in DC bus 46 back and forth.But, in other embodiments, between the baseline voltage of diagnostic signal on the contrary on ground connection and control line 26 back and forth.
In order to avoid confusion further, the voltage levvl of diagnostic signal is selected as different from the voltage levvl of control signal.Such as, in one embodiment, control signal is between ground connection and middle pressure, and diagnostic signal is between middle pressure and high pressure.
Suitable main frame amplifier 24 is TDF8599 of the NXP semiconductor manufacturing by Dutch PSV Eindhoven.But the automobile amplifier integrated circuit with diagnosis capability also can be used.Suitable controller 25 strangles Microchip Technology by State of Arizona, US Qian De, the PIC16LF1824 that Inc. manufactures, and this is the reliable 14 pin microcontrollers with multiple analog input, low sleep current and reliable electrify restoration circuit.But the low cost microcontroller with analogous capabilities also can be used.
After having described the present invention and its preferred embodiment, require as new and be claims with the patent right of written protection.
Claims (21)
1. one kind for controlling the device of ambient audio environment, described device comprises vehicle sounds system, described vehicle sounds system comprises the subwoofer system with subwoofer, for driving the satellite amplifier of described subwoofer, for the main frame amplifier of received audio signal, for providing the clunk management processing unit waiting to be used to the information realizing the audio environment expected to described main frame amplifier, for providing the transducer of the information about described ambient audio environment to described clunk management processing unit, for control line control signal being transferred to described satellite amplifier between described satellite amplifier and described main frame amplifier, and between described satellite amplifier and described main frame amplifier for by audio signal transmission to the holding wire of described satellite amplifier, described satellite controller is configured to cause diagnostic signal to be positioned on described control line, described diagnostic signal indicates the operating conditions of described subwoofer system.
2. device according to claim 1, comprises the extension speaker be connected to be driven by described main frame amplifier further.
3. device according to claim 1, wherein said satellite controller is configured to production burst bandwidth modulation signals as diagnostic signal.
4. device according to claim 1, wherein said satellite controller is configured to production burst modulation signals as diagnostic signal.
5. device according to claim 3, wherein said satellite controller is configured to generate the diagnostic signal of the duty ratio with the specific operation situation indicating described subwoofer system.
6. device according to claim 1, wherein said diagnostic signal indicates the operating conditions selected from multiple operating conditions of described subwoofer system.
7. device according to claim 1, comprises the diagnostic circuit of the operating conditions for determining described subwoofer system further.
8. device according to claim 7, comprises the register for storing the information indicating described operating conditions further.
9. device according to claim 1, during wherein said satellite controller is configured to only to be dispersed between selected diagnostic region and monitors between interval on described control line additional described diagnostic signal.
10. device according to claim 1, is included in pulling up transistor between described control line and DC bus further, and wherein said satellite controller comprise be connected to described in the output of grid that pulls up transistor.
11. devices according to claim 1, comprise the transistor being connected to described control line further, and wherein said satellite controller comprises the output of the grid being connected to described transistor.
12. devices according to claim 1, comprise further for supporting described vehicle sounds system and providing the motor vehicles of power to described vehicle sounds system.
13. 1 kinds of main frame amplifiers in vehicle sounds system and the method communicated between satellite amplifier, described method comprises: at described satellite amplifier place, via the control command of communications link reception from described main frame amplifier, the diagnostic message of the operating conditions of described subwoofer system is indicated from subwoofer system acceptance, generate the diagnostic signal of the described operating conditions of instruction based on described information, and described diagnostic signal is transported to described main frame amplifier at described communication links.
14. methods according to claim 13, wherein generate diagnostic signal and comprise generation to depend on the signal that the mode of the described information indicating operating conditions is modulated.
15. methods according to claim 13, wherein generate diagnostic signal and comprise the pulse width modulating signal generating the duty ratio with instruction operating conditions.
16. methods according to claim 13, comprise further and determine that described communication link is between diagnostic region and monitors in one of interval.
17. methods according to claim 16, wherein transmit described diagnostic signal and comprise in response to the beginning detected between diagnostic region and start to transmit described diagnostic signal.
18. methods according to claim 13, comprise further: at described main frame amplifier place, perform noise reduction algorithm at least in part based on the described diagnostic signal received from described satellite amplifier.
19. 1 kinds for generating the device of sound field within vehicle, described device comprise satellite amplifier, main frame amplifier, between described satellite amplifier and described main frame amplifier for control command being transferred to the communication link of described main frame amplifier from described satellite amplifier and being used for the device of diagnostic message of operating conditions of the subwoofer system driven by described satellite amplifier in the defeated instruction of described communication links.
20. devices according to claim 19, the described device wherein for transmitting comprises the device of the modulation signal for generating the duty ratio with the operating conditions indicating described subwoofer system.
21. devices according to claim 19, comprise further for cause described diagnostic signal only between diagnostic region period the device that is transmitted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/693,345 | 2012-12-04 | ||
| US13/693,345 US9118985B2 (en) | 2012-12-04 | 2012-12-04 | Communication of diagnostic information from satellite to host |
| PCT/US2013/072031 WO2014088891A1 (en) | 2012-12-04 | 2013-11-26 | Communication of diagnostic information from satellite to host |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104919819A true CN104919819A (en) | 2015-09-16 |
| CN104919819B CN104919819B (en) | 2018-04-24 |
Family
ID=49841818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380070150.3A Active CN104919819B (en) | 2012-12-04 | 2013-11-26 | Diagnostic message communication from subhost to host |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9118985B2 (en) |
| EP (1) | EP2929702A1 (en) |
| JP (1) | JP6144774B2 (en) |
| CN (1) | CN104919819B (en) |
| WO (1) | WO2014088891A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3335436B1 (en) | 2015-08-14 | 2021-10-06 | DTS, Inc. | Bass management for object-based audio |
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-
2012
- 2012-12-04 US US13/693,345 patent/US9118985B2/en active Active
-
2013
- 2013-11-26 WO PCT/US2013/072031 patent/WO2014088891A1/en active Application Filing
- 2013-11-26 EP EP13811300.6A patent/EP2929702A1/en not_active Withdrawn
- 2013-11-26 CN CN201380070150.3A patent/CN104919819B/en active Active
- 2013-11-26 JP JP2015546514A patent/JP6144774B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5815584A (en) * | 1996-11-08 | 1998-09-29 | Ford Motor Company | Automatic detection of shorted loudspeakers in automotive audio systems |
| CN1655649A (en) * | 2004-02-10 | 2005-08-17 | 伯斯有限公司 | Detecting connectivity of a speaker |
| CN1598949A (en) * | 2004-09-03 | 2005-03-23 | 张毅 | Card inserted digital vechile audio |
| CN1913346A (en) * | 2005-06-06 | 2007-02-14 | 富士通天株式会社 | Noise sensitive volume control device, audio device and noise sensitive volume control method |
| JP2009292399A (en) * | 2008-06-09 | 2009-12-17 | Panasonic Corp | Acoustic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9118985B2 (en) | 2015-08-25 |
| JP2016511945A (en) | 2016-04-21 |
| US20140153726A1 (en) | 2014-06-05 |
| JP6144774B2 (en) | 2017-06-07 |
| CN104919819B (en) | 2018-04-24 |
| EP2929702A1 (en) | 2015-10-14 |
| WO2014088891A1 (en) | 2014-06-12 |
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